Lock.



H. S. BRILL.

LOCK.

APPLICATION FILED MAY 6. I913- 1,290,5O3. Patented Jan. 7,1919.

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H. S. BRILL.

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APPL|CATION FILED MAY 6. 191a.

1,290,503. Patented Jan. 7,1919.

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HENRY S. BRILL, OF NEW YORK, N. Y,

LOCK.

Specification of Letters Patent.

Patented J an. "4, 1919.

Application filed May 6, 1918. Serial No. 232,832.

To all whom it may concern:

Be it known that I, HENRY S BRILL, a citizen of the United States, and resident of the borough of Manhattan, in the city and State of New York, have invented a new and useful Improvement in Locks, of which the following is a specification.

The object of my invention is to produce a very simple, cheap and effective lock comprising two separate members for attachment to two elements which are to be locked together, such, for instance, as the cover and body portion of a box, the said members being so constructed that when they are united they cannot be separated without mutilation of the parts.

Practical applications of my invention are represented in the accompanying drawings, in which,

. Figure 1 represents in perspective a box having a flap cover with the socket member shown attached to the'body portion of the box and the plunger member attached to the flap cover.

Fig. 2 is an enlarged detail section of the lock with the front plate removed, the parts being shown in full lines in the positions which they assume when the plunger member hasv been partly inserted into the socket member and in dotted lines when the plunger member has been inserted a little farther into the socket member.

Fig. 3 is a section taken in the plane of the line IIIIII of Fig. 2.

Fig. 4 is a section taken in the plane of the line IV-IV of Fig. 2.

Fig. 5 is a section similar to Fig. 2, with the plunger member shown in full lines at the limit of its inward movement and in dotted lines at the limit of its outward movement after it has been inserted into the socket member.

Fig. 6 is a section taken in the plane of the line VL-VI of Fig. 5. I

Fig. 7 is a detail view of the back socket member plate.

Fig. 8 is a detail view of the front socket member plate.

Fig. 9 is a detail view of the side strip before being bent into its proper shape.

Fig. 10 is a detail section showing the application of the lock to a box having a removable cover.

Fig. 11 is a front View of the same, and

Fig. 12 is a detailed section .showing the application of the lock to a box having a double meeting flap cover.

The plunger member of the lock is denoted by 1, and it has an ofiset portion 2 in its end. A double latch 3 is pivoted at 4, in the offset portion of the plunger member so that the front face of the latch is substantially flush with the front face of the plunger member. This offset portion may be formed by making the plunger of a strip of thin metal and bending back the strip upon itself to a point near its leading end. The socket member comprises the.

back plate 5, the front plate 6 and the side strip 7 This side strip has its ends turned inwardly to form two walls 8, 9, of an opening, the other walls being formed by the back and front plates 5, 6. The back and front plates and the side strip may be permanently united by providing the side strip with a plurality of'laterally projecting rivets 10 arranged to enter corresponding holes 11 in the back and front plates. The free ends of these rivets 10. may be spread in the usual manner to rivet the parts together.

The strip 7 is so formed that its inwardly turned ends 8 and 9 terminate a short distance from the inclined surface 12, opposite the inner end of the socket member opening. 7

The plunger is of such cross sectional area as to snugly fit the walls of the opening in the socket member.

In Fig. 1 I have shown the socket member of the look as located inside the body portion of a box having a flap cover and the plunger member. as secured to the depending lip of the flap cover in position to be permanently retained by the Socket memher when the cover is closed.

In Figs. 10 and 11 I have shown the socket member as secured to the exterior of the body portion of a box having a separate cover, the plunger member being secured to the depending flange of a separate cover in position to enter the socket member when the cover is placed in position on the body portion of the box.

In Fig. 12 I have shown the socket member as secured to the inside of one meeting cover flap and the plunger member as secured to the inside of the other meeting cover flap, it being understood that there is sufficient flexibility in the cover flaps or the plunger member to permit the insertion of the plunger member into the socket member as the cover flaps are closed.

In operation, the double latch 3 is swung into a substantially longitudinal positionin the offset portion at the end of the plunger. The plunger is then inserted into the opening in the socket member and as the leading end of the double latch reaches the inclined surface 12 of the side strip 7, the further inward movement of the plunger will swing the latch crosswise of the opening so that the ends of the latch will project beyond the inwardly turned ends of the said side strip 7. The two members of the lock will then be permanently united, requiring mutilation of the lock to separate them and requiring mutilation of the box to open the same.

It is evident that various changes might be made in the construction, form and arrangement of the several partsand it is also evident that the lock may be utilized for various purposes where two elements are to be permanently united and hence I do not wish to limit myself to the particular embodiment shown and described herein, but

What I claim is:

1. A lock comprising a plunger member and an inclosed socket member,' the plunger member having a swinging double latch and the socket member having an opening to permit the lengthwise insertion of the latch and means for automatically swinging the latch crosswise of the opening within the socket member to permanently retain the plunger member, requiring mutilation of the lock to separate the members.

2. A look comprising two separate members, the one member having a swinging double latch and the other'member having an opening to permit the lengthwise insertion of the latch and an inclined surface opposite the opening for swinging the latch crosswise of the opening to permanently-retain the first named member.

3. A look comprising a plunger member and an inclosed'socket member, the'plunger member having a swinging double latch and the 'socket member comprising front and back plates and a side strip having inwardly turned ends forming two walls of an opening to permit the lengthwise insertion of the latch and also having an inclined surface oppositethe opening for engaging and automatically swinging the latch crosswise of the opening within the socket memher to permanently retain the plunger member, requiring mutilation of the lock to separate the members.

In testimony, that I claim the foregoing as my invention, I have signed my name this-third day of May 1918.

-HENRY S. BRILL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, I). G. 

